God allows people to make their own decisions through agency which is the reason for war and crime. War and crime come from, jealousy, anger and selfishness. God can't keep people from being jealous, angry and selfish, it is a personal decision one has to make. I can overcome those feelings through Jesus Christ who came down and took upon himself all sins and I can be forgiven of my past sins and try again.
The one death that matters most that people miss is the death from our Father when we each made the conscious decision to rebel against Him and His laws. When I rebel against God and His laws, I am severed from Him. Through Jesus Christ, that connection can still exist if I try my best to follow His example. Jesus Christ also swallowed up the sting of death. He was the first to rise from the dead and have his spirit and body reunited.
This can happen to all of us and our loved ones through the resurrection which also comes through faith. Your mom is still there. She still exists because He still exists. Get close to God and study His words and his laws and He will teach you, comfort you and bless you and you will also bless those around you. You will be able to see things how God sees things and the bigger picture of the eternities.
Then in a coming time, you will embrace your mother again and other loved ones and if you tried to follow God's laws, you will also embrace your Savior Jesus Christ and if you read His words you will know Him and He will know you and you will feel a fullness of joy from the top of your head down to your toes in every element of your body.
Being in the presence of the Savior is a feeling that no drug or any other thing that this world has to offer can compare. It is a feeling that we have all felt before when we lived back in the presence of the Father before this life. It is a feeling that we are all searching for in this life. The prophet Jacob said it best:
"But, behold, the righteous, the saints of the Holy One of Israel, they who have believed in the Holy One of Israel, they who have endured the crosses of the world, and despised the shame of it, they shall inherit the kingdom of God, which was prepared for them from the foundation of the world, and their joy shall be full forever.
And he cometh into the world that he may save all men if they will hearken unto his voice; for behold, he suffereth the pains of all men, yea, the pains of every living creature, both men, women, and children, who belong to the family of Adam.
And he suffereth this that the resurrection might pass upon all men, that all might stand before him at the great and judgment day.
And he commandeth all men that they must repent, and be baptized in his name, having perfect faith in the Holy One of Israel, or they cannot be saved in the kingdom of God.
O then, my beloved brethren, come unto the Lord, the Holy One. Remember that his paths are righteous. Behold, the way for man is narrow, but it lieth in a straight course before him, and the keeper of the gate is the Holy One of Israel; and he employeth no servant there; and there is none other way save it be by the gate; for he cannot be deceived, for the Lord God is his name.
And whoso knocketh, to him will he open; and the wise, and the learned, and they that are rich, who are puffed up because of their learning, and their wisdom, and their riches—yea, they are they whom he despiseth; and save they shall cast these things away, and consider themselves fools before God, and come down in the depths of humility, he will not open unto them.
But the things of the wise and the prudent shall be hid from them forever—yea, that happiness which is prepared for the saints.
Come, my brethren, every one that thirsteth, come ye to the waters; and he that hath no money, come buy and eat; yea, come buy wine and milk without money and without price.
Wherefore, do not spend money for that which is of no worth, nor your labor for that which cannot satisfy. Hearken diligently unto me, and remember the words which I have spoken; and come unto the Holy One of Israel, and feast upon that which perisheth not, neither can be corrupted, and let your soul delight in fatness.
Behold, my beloved brethren, remember the words of your God; pray unto him continually by day, and give thanks unto his holy name by night. Let your hearts rejoice."
- 2 Nephi 9:18, 21-23, 41 - 43, 51 - 53